<!DOCTYPE html>
<style>
body, ol, p {
    margin: 0;
    font-size: 16px;
}
body {
    line-height: 10;
}
section {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: white;
}
</style>
<ol><li>Hello</ol><section></section>

